Motor Protection Circuit Breakers

Manual Motor Starters (MMS) are protection devices for the main circuit. They combine motor control and protection in a single device.

MMS are used mainly to switch motors manually ON/OFF and protect them and the installation fuse less against short-circuit, overload and phase failures. Fuse less protection with a manual motor starter saves costs, space and ensures a quick reaction under short-circuit condition, by switching off the motor within milliseconds.

ABBs Manual Motor Starters can be equipped with many other accessories. Connection links ensure that the ABB Manual Motor Starter can be connected to ABB Block Contactor and Soft starters easily and wiring-free. The ABB Manual Motor Starter covers a range up to 100 A for motors protection up to 45 kW / 400 V.

Manual Motor Starter with a short-circuit service breaking capacity Ics of up to 50 kA

MS116 is a compact and economic range for motor protection up to 15 kW (400 V) / 32A in width of 45 mm.

MS496/MS497 are for the protection of bigger motors up to 55 kW (400 V) / 100A in a width of 75 mm.

High performance Manual Motor Starter for special applications with short-circuit service breaking capacity Ics of up to 100 kA

MS325 is a high performance Manual Motor Starter up to 12.5 kW (400 V) / 25A and with a very low "energy let through"-value. In addition, special versions for SMISSLINE available.Characteristics of Manual Motor Starter range

Overload protection – trip class 10 or 20

Phase failure sensitiveness

Disconnect function for safety isolation of the installation and the supply